Salter Brecknell S122 - Manual (Page 32)

4.4 RS232 PIN assignments 4 Installation/Maintenance
S122 User / Service Instructions 32
4.4 RS232 PIN assignments
The RS232 serial communications board allows the indicator
to send data to an external device such as a printer or
computer. The default baud rate is 2400. To change the
setting
s see section 5.8. The wiring circuit of the RS232
comm unication board is shown on page 59. .
J1 and J3 SHORT; J2 and J4 OPEN (default)
PIN 2 RXD
PIN 3 TXD
PIN 7 GND
Other pin s are not used.
J2 and J4 SHORT; J1 and J3 OPEN
PIN 2 TXD
PIN 3 RXD
PIN 7 GND
Other pin s are not used.